Pipe wrench



Jan. 1, 1924 J. A. BIZZELL PIPE WRENCH Filed Sept. 23, 1922 PatentedJan. 1, 1924.

FFIE.

JAMES A. BIZZELL, OF BALTIIVIORE, MARYLAND.

PIPE WRENCH.

Application filed September 23. 1922.

To all whom z't may concern:

Be it known that 1, JAMES A. BIZZE-LL, a citizen of the United States,residing at Baltimore, State of Maryland, have invented certain new anduseful Improvements in a Pipe rench; and I do hereby declare thefollowing to be a. full, clear, and exact clescription of the invention,such as will enable others skilled in the ant to which it appertains tomake and use the same.

The object of the invention is to provide a non-slipping andnon-crushing pipe wrench whereby the necessary grip and leverage may beobtained without a tendency to injure or disfigure or distort the objectwhich is grasped, and to this end the same consists of a constructionand combination of elements of which a preferred embodiment isillustrated in the accompanying drawing, wherein:

Figure l is a side view of the wrench having represented thereonconstruction lines indicating the medial longitudinal. line of the shankor handle and continuations of the planes of the jaw faces to show therelation between the sections,

Figure 2 is a plan view of the wrench,

Figure 3 is a detail view of the serrated or gripping face of the upperor drawing aw.

The wrench is of the fixed jaw type having a shank or handle 10 and thehead 11 provided with divergent dragging and pushing jaws 12 and 13 ofwhich the former carries a removable serrated gripping bloc-k let.

The faces of the jaws which converge toward the junction of the shank orhandle with the head, which is integral preferably therewith, aredisposed on the same side of the medial longitudinal line a of the shankor handle or forward of the plane of said medial line in the directionof operative movement of the wrench as indicated by the arrow inFigure 1. Moreover these operative faces of the jaws are arranged inplanes which intersect preferably within the area of the head 11 andwith the intersection occurring on the medial longitudinal line ofSerial No. 590,060.

the shank or handle, the continuations of the lines of said operativefaces being indicated respectively at b and c and the point ofintersection thereof with the med al line being indicated at (Z, theconstruction lines a, Z) and 0 being dotted in Figure 1 for conveniencein reference.

This arrangement of the elements of the wrench provides for a grippingaction of the jaws without tending to apply a crushing or disfiguringpressure to the object engaged thereby and under conditions insuring afirm hold of the engaged object as against a tendency to slip or slideon the surface thereof.

The facing block of the dragging jaw 12 is of a length coextensive withthe jaw face and has an interlocking engagement in the jaw by means ofthe dovetailed key 15 fitting in the undercut seat 16 in the jaw. Thekey and seat extends transversely of the jaw and preferably taperedslightly so that the block may be inserted laterally and when driven. toplace will retain its position with out any tendency to movement due tothe operation of the wrench inasmuch as the strain applied to theserrated block in the operation of the wrench is transverse to theengaging faces of the key and seat.

Having thus described the invention, what I claim iss- A fixed jawwrench having a head and a handle or shank, a pair of divergentlydisposed jaws formed in said head with their operative faces arranged onthe same side of a prolongation of the medial longitudinal line of theshank, said j aws arranged at an acute angle to each other and incliningaway from said medial line, and said jaws arranged in planes whichintersect at a point on said medial line and within said head, thedragging jaw being toothed.

In testimony whereof I affix my signature in presence of two witnesses.

p JAMES A. BIZZELL. Witnesses ALBERT WV. Fos'rnn, J OHN T. VVILeoN.

